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!"#$%&'$()!#*)+!(,)+-$.,-.,/$0,)1#*#)0#$ 2345$6789$:$+3;389$6<'=$%>76$ University of New Brunswick, Fredericton New Brunswick, Canada SCOPE This is the second (http://www2.unb.ca/vip/IVC2013/) of what we hope to be a long series of Volvox meetings to be held every other year. The idea of a meeting on everything about Volvox and its relatives (aka Volvocales or volvocine algae) reflects both an increase in the size of the Volvox community and the realization that many researchers from fields traditionally not associated with Volvox research (e.g., physics, theoretical biology) are interested in various aspects of the system. Indeed, volvocine algae have become an important model system for the evolution of multicellularity, development and cellular differentiation, and lately have yielded important results in fields as diverse as genomics, hydrodynamics, and social evolution. We hope that these meetings will continue to foster exchange of ideas and expertise, and will initiate new collaborations. Furthermore, with these meetings we wish to attract new people and to build a stronger Volvox community. CONFERENCE ORGANIZER Aurora M. Nedelcu, University of New Brunswick, Canada ORGANIZING COMMITTEE Matthew Herron, University of Montana, USA Erik Hanschen, University of Arizona, USA David Smith, University of Western Ontario, Canada Hisayoshi Nozaki, University of Tokyo, Japan James Umen, Donald Danforth Plant Science Center, USA Stephen Miller, University of Maryland Baltimore County, USA Annette Coleman, Brown University USA Aurelia Honerkamp-Smith, University of Cambridge, UK SPONSORSHIP AND SUPPORT Company of Biologists Phycological Society of America www.biologists.com/ www.psaalgae.org/ PROGRAM AT A GLANCE Day Time Activity Location July 31st, Wednesday 5:00 - 9:30 Registration Wu Center; Foyer 6:30 - 10:00 Welcome Reception Wu Center; Foyer August 1st, Thursday 7:30 – 8:30 Breakfast Wu Ctr; Chancellor’s Room 8:30 – 10:00 Morning Session 1: Life Cycle Wu Ctr; Chancellor’s Room 10:00 – 10:30 Break Wu Ctr; Chancellor’s Room 10:30 – 12:00 Morning Session 2: Development Wu Ctr; Chancellor’s Room 12:00 – 1:30 Lunch Wu Ctr; Chancellor’s Room 1:30 – 3:00 Afternoon Session 1: Taxonomy Wu Ctr; Chancellor’s Room 3:00 – 3:30 Break Wu Ctr; Chancellor’s Room 3:30 – 5:00 Afternoon Session 2: Genetics Wu Ctr; Chancellor’s Room 5:00 – 6:30 Poster Session Wu Ctr; Foyer 6:30 – 8:30 Maritime dinner Wu Ctr; Chancellor’s Room 9:00 – 10:30 Social mixing Dolan’s Pub; Lunar Rogue August 2nd, Friday 7:30 – 8:30 Breakfast Wu Ctr; Chancellor’s Room 8:30 – 10:00 Morning Session 1: Evolution 1 Wu Ctr; Chancellor’s Room 10:00 – 10:30 Break Wu Ctr; Chancellor’s Room 10:30 – 12:10 Morning Session 2: Evolution 2 Wu Ctr; Chancellor’s Room 12:10 – 1:30 Lunch Wu Ctr; Chancellor’s Room 1:30 – 3:00 Afternoon Session 1: Genomics Wu Ctr; Chancellor’s Room 3:00 – 3:30 Break Wu Ctr; Chancellor’s Room 3:30 – 4:30 Afternoon Session 2: Workshop Wu Ctr; Chancellor’s Room 4:30 – 5:30 Round Table Wu Ctr; Chancellor’s Room 5:30 – 6:30 Movie and Trivia Night Wu Ctr; Chancellor’s Room 6:30 – 10:00 Banquet - Dinner by the River Delta Hotel August 3rd, Saturday 8:30 – 10:30 Breakfast at Farmers Market Farmers Market 11:00 – 2:00 Boat River Cruise and Lunch Regent Street Wharf 2:00 - Downtown (on your own) Queen Str. and King Str. August 3rd SCIENTIFIC PROGRAM THURSDAY, AUGUST 1, 2013 MORNING SESSION 1: LIFE CYCLE (Chair: Annette Coleman) 8:30 – 8:45 Introduction 8:45 – 9:10 Kaoru Kawafune (University of Tokyo) Different rickettsial bacteria invading Volvox carteri by endosymbiosis and horizontal gene transfer 9:10 – 9:35 Ben Rosenzweig (University of Montana) Can algae acquire Vitamin B12 from bacterial endosymbionts? 9:35 – 10:00 Stephen Miller (University of Maryland Baltimore County) Effect of resource limitation on asexual development of Volvox carteri Title missing MORNING SESSION 2: DEVELOPMENT & CELL DIFFERENTIATION (Chair: Stephen Miller) 10:30 – 10:45 Introduction 10:45 – 11:10 Stephanie Hoehn (University of Cambridge) Type B embryo inversion in Volvox globator 11:10 – 11:35 Patrick J. Ferris (University of Arizona) Evolution of a soma-determining gene 11:35 – 12:00 Zach Grochau-Wright (University of Arizona) Discovery of regA family genes in non-Volvox species AFTERNOON SESSION 1: TAXONOMY AND PHYLOGENY (Chair: Hisayoshi Nozaki) 1:30 – 1:45 Introduction 1:45 – 2:10 Annette Coleman (Brown University) A Volvocacean jackpot 2:10 – 2:35 Hisayoshi Nozaki (University of Tokyo) Two species of a new ‘missing link’ genus of the “evolutionary time machine” Volvocine greens 2:35 – 3:00 Thomas Pröeschold (University of Rostock) How to use ITS-2 as DNA barcode marker? A case study of the Volvocales AFTERNOON SESSION 2: MOLECULAR AND EVOLUTIONARY GENETICS (Chair: Jim Umen) 3:30 – 3:45 Introduction 3:45 – 4:10 Sa Geng (Donald Danforth Plant Science Center) Genetic basis of sexual dimorphism in Volvox carteri 4:10 – 4:35 Takako Kato-Minoura (Chuo University) Molecular evolution of volvocalean actin genes 4:35 – 5:00 Aurora Nedelcu (University of New Brunswick) The SAND domain and the evolution of multicellular complexity EVENING (5:00 – 6:30): POSTER SESSION P1: Aurelia R. Honerkamp-Smith (University of Cambridge) Selective plane illumination for 3-dimensional cell tracking during Volvox development and inversion P2: Hiroko Kawai-Toyooka (University of Tokyo) Mating type-specific two-step regulation for the fusogen GCS1 in the isogamous volvocine alga Gonium pectorale P3: Arash Kianianmomeni (University of Bielefeld) Validation of reference genes for quantitative gene expression studies in Volvox carteri using real-time RT-PCR P4: Aleatha Lee (University of New Brunswick) Volvox carteri as a model-system for cancer research P5: Gavriel Matt (Donald Danforth Plant Science Center) Separation of gonidia and somatic cell types for high-throughput transcriptome analysis using RNA-seq P6: Jassy Meng (University of New Brunswick) Volvox as a model-system for aging research P7: Linna Meng (University of New Brunswick) Single-domain TAZ-containing proteins potentially involved in the evolution of multicellularity in Volvox carteri P8: Ayano Miyagi (Donald Danforth Plant Science Center) Functional studies of volvocine algal Mid proteins in Chlamydomonas reinhardtii P9: Noriko Ueki (Chuo University) A uniquely tagged transposon for improved transposon-based mutagenesis in Volvox carteri P10: Stephanie Hoehn (Cambridge University) Biomechanical features of diverse inversion processes in Volvox sp. FRIDAY, AUGUST 2, 2013 MORNING SESSION 1: EVOLUTION 1 (Chair: Matthew Herron) 8:30 – 8:45 Introduction 8:45 – 9:10 Matthew Herron (University of Montana) Experimental evolution of a multicellular life cycle in Chlamydomonas reinhardtii 9:10 – 9:35 Yoko Arakaki (University of Tokyo) The simplest multicellular organism Tetrabaena socialis 9:35 – 10:00 Cristian Solari (University of Buenos Aires) Costs and benefits of the first steps toward multicellularity: A Gonium pectorale (Volvocaceae) case study MORNING SESSION 2: EVOLUTION 2 (Chair: Aurora M. Nedelcu) 10:30 – 10:45 Introduction 10:45 – 11:10 James Umen (Donald Danforth Plant Science Center) Evolution of sexual dimorphism in volvocine algae 11:10 – 11:35 Erik R. Hanschen (University of Arizona) Sex and cell types: understanding the evolution of volvocine cell types 11:35 – 12:00 Matheus Lima (University of Sao Paulo) Testing the oxidative damage theory of aging in Volvox carteri ! AFTERNOON SESSION 1: GENOMICS (Chair: David Smith) 1:30 – 1:45 Introduction 1:45 – 2:10 Takashi Hamaji (Kyoto University) Evolutionary dynamic features of mating loci inferred from de novo genome sequencing of Gonium pectorale (Volvocales, Chlorophyta) 2:10 – 2:35 David R. Smith (Western University) The nonphotosynthetic volvocalean Polytomella: a genome discovery & mystery story 2:35 – 3:00 Adrian Reyes-Prieto (University of New Brunswick) Exploring genomic consequences after the loss of photosynthesis in the colorless alga Polytoma uvella AFTERNOON SESSION 2: GENOMICS AND WORKSHOP/ROUND TABLE (Chair: Brad Olson) 3:30 – 4:30 Bradley J.S.C. Olson (Kansas State University) The Volvocales genome project 4:30 – 5:30 Round Table 1. Genome data analysis– approaches and challenges 2. Future comparative genomics possibilities from the Volvocales genomes 3. Working with comparative genomics data to generate candidate gene lists and validate them experimentally EVENING SESSION 5:30 – 6:30 Movie and trivia night – Movies and trivia featuring volvocine algae Abstracts published in this volume or posted on the website should be treated as Personal Communications and only cited with the consent of the authors. ABSTRACTS TALKS (by session) Life Cycle (Chair: Annette Coleman) DIFFERENT RICKETTSIAL BACTERIA INVADING VOLVOX CARTERI BY ENDOSYMBIOSIS AND HORIZONTAL GENE TRANSFER Kaoru Kawafune1, Yuichi Hongoh2, Takashi Hamaji3, Tomoaki Sakamoto4, Tetsuya Kurata4, Shunsuke Hirooka5, Shin-ya Miyagishima5 and Hisayoshi Nozaki1 1. Dept. of Biology, Grad. School of Science, University of Tokyo, Tokyo, Japan 2. Dept. of Biological Sciences, Grad. School of Bioscience and Biotechnology, Tokyo Institute of Technology, Tokyo, Japan 3. Dept. of Botany, Grad. School of Science, Kyoto University, Kyoto, Japan 4. Plant Global Education Project, Grad. School of Biological Sciences, Nara Institute of Science and Technology, Nara, Japan 5. Center for Frontier Research, National Institute of Genetics, Shizuoka, Japan A bacterial endosymbiont was observed in the cytoplasm of Volvox carteri f. weismannia UTEX 2180 using transmission electron microscopy (Kochert & Olson 1970, Trans. Am. Microsc. Soc.), but it has not been identified using molecular methods. Recently we reported molecular identification of similar endosymbionts in other volvocaleans, Pleodorina japonica and Carteria cerasiformis, and demonstrated that the endosymbionts belong to the eubacteria family Rickettsiaceae, which consists of a major group hosted by arthropods, and “hydra group” by non-arthropods (Kawafune et al. 2012, PLoS ONE). In this study we examined the endosymbiont of V. carteri UTEX 2180 in a phylogenetic and fluorescence in situ hybridization analysis of the 16S rRNA gene.
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  • The Flagellar Photoresponse in Volvox Species (Volvocaceae, Chlorophyceae)1

    The Flagellar Photoresponse in Volvox Species (Volvocaceae, Chlorophyceae)1

    J. Phycol. 47, ***–*** (2011Diana) Ó 2011Diana Phycological Society of America DOI: 10.1111/j.1529-8817.2011.00983.x NOTE THE FLAGELLAR PHOTORESPONSE IN VOLVOX SPECIES (VOLVOCACEAE, CHLOROPHYCEAE)1 Cristian A. Solari2 CONICET, Departamento de Biodiversidad y Biologı´a Experimental (FCEyN), Laboratorio de Biologı´a Comparada de Protistas, Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina Knut Drescher and Raymond E. Goldstein Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, UK Steering their swimming direction toward the light specialization, each of the Chlamydomonas-like somatic is crucial for the viability of Volvox colonies, the lar- cells is positioned at the surface of the extracellular ger members of the volvocine algae. While it is matrix, with its two flagella oriented outward, while known that this phototactic steering is achieved by a the germ cells grow inside the colony. Volvox species difference in behavior of the flagella on the illumi- with germ-soma separation have evolved several times nated and shaded sides, conflicting reports suggest independently from quite different colonial ancestors that this asymmetry arises either from a change in with no cellular differentiation (Coleman 1999, No- beating direction or a change in beating frequency. zaki et al. 1999, 2006, Nozaki 2003, Herron and Mi- Here, we report direct observations of the flagellar chod 2008). These species with different phyletic behavior of various Volvox species with different phy- origin have been classified within the volvocine algae letic origin in response to light intensity changes and into different sections ⁄ groups (Smith 1944, Nozaki thereby resolve this controversy: Volvox barberi W.
  • Green Microalga Trebouxia Sp. Produces Strigolactone

    Green Microalga Trebouxia Sp. Produces Strigolactone

    bioRxiv preprint doi: https://doi.org/10.1101/195883; this version posted September 29, 2017. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. 1 1 Green microalga Trebouxia sp. produces strigolactone- 2 related compounds 3 4 Smýkalová I.1, Ludvíková M.1, Ondráčková E.1, Klejdus B.2, Bonhomme S.3, Kronusová O.4, 5 Soukup A.5, Rozmoš M.6, Guzow-Krzemińska B.7, Matúšová R.8 6 7 1 Agritec Plant Research Ltd., Zemědělská 16, Šumperk, 787 01, Czech Republic; 8 2 Department of Chemistry and Biochemistry, Mendel University in Brno, Zemědělská 1, 9 Brno, 613 00 Brno, Czech Republic; 10 3 Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Route 11 de St-Cyr 10, 780 26 Versailles Cedex, France. 12 4 Ecofuel Laboratories Ltd., Ocelářská 9, 190 02 Prague, Czech Republic; 13 5 Department of Experimental Plant Biology, Faculty of Science Charles University in 14 Prague, Viničná 5, 128 44 Prague 2, Czech Republic; 15 6 Institute of Experimental Biology, Faculty of Plant Science, Masaryk University, Kotlářská 16 267/2 , Brno, 611 37, Czech Republic; 17 7 Department of Plant Taxonomy and Narture Conservation, Faculty of Biology, University 18 of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland; 19 8 Plant Science and Biodiversity Center SAS, Institute of Plant Genetics and Biotechnology, 20 Akademicka 2, PO Box 39A, 95007 Nitra, Slovak Republic; 21 22 Corresponding authors: [email protected]; [email protected] 23 Running title 24 Production of SLs in microalga 25 Highlight 26 In lichenized alga Trebouxia arboricola there are produced SLs-related compounds inducing 27 germination of parasitic weed Phelipanche aegyptiaca; T.